The Sanger Silverbird was a revolutionary design for a jet powered super sonic plane that could deliver a nuclear bomb to America from stratospheric altitudes upwards of 80,000 feet. It had an engine cooling system that circulated the jet’s own fuel to keep temperatures down. The plane was flattened at the bottom to add lift and fuel was carried in two very large cylinders along the ventral shaft. A single rocket engine produced 100 tons of thrust and the ability to carry a four-ton bomb.
Work ended on it in 1941.
Source: Luft46.com


